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Crossing the line: migratory and homing behaviors of Atlantic bluefin tuna

2014; Inter-Research; Volume: 504; Linguagem: Inglês

10.3354/meps10781

1616-1599

Jay R. Rooker, Haritz Arrizabalaga, Igaratza Fraile, David H. Secor, DL Dettman, Nouredinne Abid, Piero Addis, Simeon Deguara, F. Saadet Karakulak, Ai Kimoto, Osamu Sakai, David Macías, MN Santos,

Fish Ecology and Management Studies

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 504:265-276 (2014) - DOI: https://doi.org/10.3354/meps10781 Crossing the line: migratory and homing behaviors of Atlantic bluefin tuna Jay R. Rooker1,*, Haritz Arrizabalaga2, Igaratza Fraile2, David H. Secor3, David L. Dettman4, Noureddine Abid5, Piero Addis6, Simeon Deguara7, F. Saadet Karakulak8, Ai Kimoto9, Osamu Sakai9, David Macías10, Miguel Neves Santos11 1Department of Marine Biology, Texas A&M University, 1001 Texas Clipper Road, Galveston, Texas 77553 USA 2AZTI Tecnalia, Marine Research Division, Herrea Kaia, Portualdea z/g 20110 Pasaia, Gipuzkoa, Spain 3Chesapeake Biological Laboratory, University of Maryland Center for Environmental Science, PO Box 38, Solomons, Maryland 20688, USA 4Environmental Isotope Laboratory, Department of Geosciences, 1040 E. 4th Street, University of Arizona, Tucson, Arizona 85721, USA 5Institut National de la Recherche Halieutique, INRH, Regional Centre of Tangier, BP: 5268, Dradeb, Tangier, Morocco 6Department of Life Science and Environment, University of Cagliari, Via Fiorelli 1, 09126 Cagliari, Italy 7Federation of Maltese Aquaculture Producers 54, St. Christopher Str., Valletta VLT 1462, Malta 8Faculty of Fisheries, Istanbul University, Ordu Cad. N° 200, 34470 Laleli, Istanbul, Turkey 9National Research Institute of Far Seas Fisheries, 5-7-1 Orido Shimizu, Shizuoka, Japan 10Spanish Institute of Oceanography, Corazón de María 8, 28002 Madrid, Spain 11Instituto Nacional dos Recursos Biológicos (INRB I.P. IPIMAR), Avenida 5 de Outubro s/n, 8700-305 Olhao, Portugal *Corresponding author: rookerj@tamug.edu ABSTRACT: Assessment and management of Atlantic bluefin tuna Thunnus thynnus populations is hindered by our lack of knowledge regarding trans-Atlantic movement and connectivity of eastern and western populations. Here, we evaluated migratory and homing behaviors of bluefin tuna in several regions of the North Atlantic Ocean and Mediterranean Sea using chemical tags (δ13C and δ18O) in otoliths. Significant emigration of bluefin tuna from their place of origin was inferred from otolith δ13C and δ18O, with both eastern and western bluefin tuna commonly 'crossing the line' (45° W management boundary) in the Central North Atlantic Ocean and mixing with the other population. Several western migrants were also detected in Moroccan traps off the coast of Africa, indicating that trans-Atlantic movement occurs for members of the western population; however, the degree of mixing declined with proximity to the eastern spawning area (Mediterranean Sea). The origin of bluefin tuna collected at the entrance to the Strait of Gibraltar and from several regions within the Mediterranean Sea (Balearic Islands, Malta, and Sardinia) was essentially 100% eastern fish, demonstrating that natal homing is well developed by the eastern population, with western migrants rarely entering the Mediterranean Sea. KEY WORDS: Stable isotopes · Nursery origin · Otolith chemistry · Stock structure · Population connectivity · Migration · Philopatry Full text in pdf format Supplementary material PreviousNextCite this article as: Rooker JR, Arrizabalaga H, Fraile I, Secor DH and others (2014) Crossing the line: migratory and homing behaviors of Atlantic bluefin tuna. Mar Ecol Prog Ser 504:265-276. https://doi.org/10.3354/meps10781 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 504. Online publication date: May 14, 2014 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2014 Inter-Research.